Bilge water discharge



June14, 1938. W, M, AVANT 2,120,858

BILGE WATER DISCHARGE Filed Jan. 2 6, 1957 W www Patented June 14, 1938 'Y PAT-ENT OFFICE BILGE` WATER DISCHARGE William M. Davant, Savannah, Gra.

Application January 26, 1937, Serial No. 122,472

2 Claims.

This invention relates to a bilge-water discharge.

It has been proposed to use `flared tubes of various configurations at the end of a pipe with the tubes being disposed in the water while the opposite end ofv the pipe is fastened or secured in any approved manner to a point adjacent the bottom of the boat or where the bilgewater occurs in an attempt to create a suction in the pipe for withdrawing the water from the boat. Devices of this kind areso'constructed that they y-form a part of the boat but areineffective for the withdrawal of the bilge-Water unless the boat is being driven at extremely high speeds and in that event such devices only feebly suck out the water.

An object of the invention is the provision of a bilge-Water discharge for boats in which a Venturi tube is provided having its opposite ends flared and supported by arms on a pipe located axially of the tube with the free end of the pipe being disposed in the most effective area of the Venturi section of the tube, the opposite flared end of the tube being free to the atmosphere so that when the tube is withdrawn through the Water at a reasonable rate of speed an intense suction action will be created in the tube and at the free end of the pipe for rapidly withdrawing water from the interior of the boat, the device being so constructed that it may be readily detached or attached to the boat.

A further object of the invention is the provision of a bilge-water discharge for boats in which a suction pipe has its free end disposed in a Venturi section of 'a tube having its opposite ends flared, said `tube being adjustably mounted on the pipe so that the tube may be moved concentrically with respect to the pipe for properly adjusting the free end of the pipe in the most effective position within the Venturi section of the tube, said pipe having an extension adapted to be placed within the boat and inserted within the bilge-water located in said boat.

This invention will be best understood from a consideration of the following detailed description, in view of the accompanying drawing forming a part of the specication; nevertheless, it is to be understood that the invention is not confined to the disclosure, being susceptible of such changes and modifications as define no material departure' from the salient features of the invention as expressed in the appended claims.

In the drawing: l

Figure 1 is a view in perspective of a boat showing my bilge-water discharge applied thereto,

bilge-water discharge,

Figure 3 is a transverse vertical section taken valong the line 3--3 of Figure 2 showing a wrench applied to an adjustable nut, and l 5 Figure 4 is a transverse vertical section taken along the line 4-4 of Figure 2.

Referring more particularly to the drawing, I0 designates a suction pipe which is threaded at II to receive a nut I2. On the inner end of .10 the pipe is secured in any approved manner a flexible hose I 3 which is clamped at I4 to the threaded end II of the pipe 'I0 and this hose eX- tends over the top of the boat I5 and the free end I6 of said hose is adapted to be placed into 15 any water which has collected in the bottom of the boat.

Extending outwardly from the nut I2 is a pair of arms I1 and I8 and these arms are bowed outwardly intermediate their ends, as shown at I9, and in spaced relation with the pipe I0.

A Venturi tube, generally designated by the numeral 20, has a portion 2| which is reduced in cross sectional area to provide-a Venturi section. The opposite ends of the tube are tapered or flared outwardly to provide expanded ends 22 and 23. The outer free ends of the arms II and I8 are secured at 24 to the outer surface of the flared end 23 of the tube 20.

The outer free end of the pipe I0, as shown at 25 is disposed within the Venturi section 2I of the tube and the external diameter of the free end of the pipe I0 is less than the internal diameter of the Venturi section 2I in order to provide an annular space between the free ends of thel pipe I0 and the internal surface of the Venturi section 2|.

A jamb nut 3l may be revolved in any approved manner by a suitable tool such as a Spanner wrench, indicated in dotted lines at 30 in Fig. 3. 40 However, the nut may have any suitable conguration for the application of any of the Vwell known forms of wrenches. Said nut is adapted to retain the nut I2 in its adjusted position.

It will be appreciated that the present device is so constructed as it merely forms an attachment for boats and may be removed readily when not desired sol that it does not form a permanent fixture of the boat. The inner end I6 of the iiexible pipe I3, as has been previously stated, is directed into the water to be removed and any suitable clamping means may be employed for retaining said free end in position.

The nut I2 is revolved until the free end 25 of the suction pipe I0 is located in approximatethe free end 25 of the pipe I with sulcient force to readily cause the Ibilge-Water in the boat to be Withdrawn therefrom. l

It may be found that the water is not being discharged with sufficient rapidity. The nut 3l is released and the nut I2 is then rotated so that the Venturi section 2| will be properly positioned with respect to the free end 25 of the tube l0 for increasing the suction in the pipe I and thereby provide for a speedier Withdrawal of the Water from the boat. The nut 3l is drawn up tight against the cut i2 after the adjustment.

It will be seen by this construction that a great deal of water will enter the flared end 23 of the tube 20 and this water when it passes a restricted area of the Venturi section will be under pressure so that when it passes the free end of the pipe i0 and enters the flared outer discharge end 22 of the tube 2D the speed of the water in the ared end 22 will be increased for creating sumcient suction in the pipe lil to remove the bilge-Water ata reasonable speed of the boat I5.

I claim:

l. A bilge-water discharge comprising a pressure tube having the opposite ends thereof tapered to a reduced intermediate portion, said intermediate portion forming a Venturi section, a pipe of lesser external diameter than the interior cross-sectional area of the Venturi section of the tube and having a free end disposed in said section, arms connected to one end of the tube, a nut secured to the arms and threaded on the other end of the pipe so that the Venturi section may be adjusted relative to the free end of the pipe and fixed in a predeterminedY position, and

.a flexible hose connected to the pipe and supporting the tube and pipe.

2. A bilge-Water discharge comprising a pressure tube having an intermediate portion reduced in cross-sectional area to provide a Venturi section, the outer ends being expanded, said tube being tapered progressively inwardly from the outer expanded endsthereof to the reduced portion, a pipe located axially of the tube and having the free outer end terminating in the reduced portion, a sleeve threaded onto the inner end of the pipe, arms connected between the inner end of the pressure tube and the sleeve and being bowed outwardly from the pipe, rotation of the sleeve causing the outer end of the pipe to be adjusted relative to the reduced section of the venturi, the opposite ends of the tube being open to the atmosphere, the other end of the pipe being extended for insertion into bilge-Water in a boat.

' WILLIAM M. DAVANT. 

